<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input v-model.trim="name" @keyup.enter="add" @keyup.esc="name=''" class="new-todo" placeholder="请输入任务名称" autofocus />
  </header>
</template>

<script>
export default {
  data () {
    return {
      name:""
    }
  },
  methods: {
    add(){
      if(this.name==="")return alert("请输入不能为空");
      this.$emit("add-event",this.name);
      this.name="";
    }
  }
}
</script>

<style></style>
